Airship



l Sept. 13', 1927.

, 1,642,026 K. HURTTLE AIRSHIP Filed Feb. 11, 1925 INVENTOR ATTORNEYS Patented Sept. 13, 1927.

i "UNITED, STA Tes PATENT OFF KARL HIUIRTTLILVOF FRIEDRIGHSHAFEN, BOIDENSEE, GERMANY, ASSIGNOR Td LUFT- SGI-IIFFBAU ZEPPELIN GESELLSCHAFT MIT BESGHRKNKTER HAFT'U'NG, F FRIED- RICHSHAFEN, BODENSEE, GERMANY.

AIRS'HIP.

Application filed February 11, 1925, Serial No. 8,352, and in Germany February 29, 1924.

' My invention relates to airships, and more especially to rigid airships. I

It is usual to have a network of strings loosely stretched inside the panels formed by the girders of the ships hull. The gas cells inserted in the hull bear against this network. A certain bulging of the network is allowed, but this bulging must not ex-' ceed a certain margin which is given by the outer cover stretched over the outside of the panels. On-the other hand, it is of advantage to have some bulging because it increases the gas capacity of the cells. It is therefore desirable to provide for a fixed amount of bulging. The ordinary string netting will expand while in use and will also be highly sensitive to moisture. This causes'changes in the degree of bulging,

which means that you have to provide for a 2 very low limit for bulging from the beginning. According to my invention, I improve these conditions by impregnating the strings with a substance which will reduce their elastic expansion. This limits the margin in the possible changes of bulging.

An impregnation of the strings with a substance which renders them less sensitive to moisture will work to the same effect. So, if such means are made use of in accordance with my invention, the limit for bulging allowable from the beginning will be greater, which means greater gas capacity of the cell.

Having given a general description of my invention, I now want to point it out more in detail referring to the drawing which represents an example embodying my invention. I

Fig. 1 is part of a cross section of an airship, and Fig. 2 represents a panel of the airship hull, in side view with the outer cover removed. V

The letter L designates the longitudinal members of the hull, over which the outer cover 0 is stretched. The wall of the gas cell is shown at G, and S are the strings against which the Wall G bears and which are impregnated with a cellulose varnish, dope or the like to reduce their elasticity and to render them less sensitive to moisture.

Ais the air jacket between the wall of the gas cell G and the outer cover 0. The bulging of wall G into this jacket must be limited according to the above description.

I do not want to be limited to the exact details of the description, or the example shown in the drawing, as many variations will occur to those skilled in the'art.

What I claim is:

1. Method of limiting the margin in th bulging of gas cells in airships which consists in impregnating the strings constituting the network against which the walls of said cells bear with a substance adapted to reduce the elastic expansion of said strings.

2. Method of limiting the margin in the bulging of gas cells in airships which consists in impregnating the strings constituting the network against which the walls of said cells bear with a substance adapted to render said strings less sensitive to moisture.

3. Method of limiting the margin in the bulging of gas cells in airships which c0nsists in impregnating the strings constituting the network against which the walls of said cellsbear with a substance adapted to reduce the elastic expansion of said strings and to render said strings less sensitive to moisture. V v

p 4. Method of limiting the margin in the bulging of gas cells in airships which consists in impregnating the strings constituting the network against which the walls of said cells bear with a cellulose varnish.

.5. In a rigid airship, a hull, a compartment within said hull, a gas cell inserted in said compartment, a network of strings con fining the bulging of the walls of said cell, said strings being impregnated with a substance which reduces their elastic expansion.

6. In a rigid airship, a hull, a compartment within said hull, a gas cell inserted in said compartment, a network of strings confining the bulging of the walls of said cell, said strings being impregnated with a substance which renders them less sensitive to moisture.

7. In a rigid airship, a hull, a compartment within said hull, a gas cell inserted in said compartment,a network of strings confin ng H e iimlg ng said strings being sl'a-nce which reduces and which renders them less moisture.

of the walls of said cell, iniipregna-ted with a subthen. elastic expansion sensitive to a hull, a compartment Within said hull, a gas cell inserted in said cmnparlincnt, fining the bulging said strings being lulose varnish.

In testimony whereof I affix my signature.

:1 network of strings 0011- of the Walls of said cell,

1111 We -naked with a (tel- 10 KARL HfIRTTLE. 

